8640064782 has 12 divisors (see below), whose sum is σ = 18720140400. Its totient is φ = 2880021588.

The previous prime is 8640064781. The next prime is 8640064813. The reversal of 8640064782 is 2874600468.

8640064782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640064781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240001782 + ... + 240001817.

It is an arithmetic number, because the mean of its divisors is an integer number (1560011700).

Almost surely, 2^8640064782 is an apocalyptic number.

8640064782 is an abundant number, since it is smaller than the sum of its proper divisors (10080075618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8640064782 is a wasteful number, since it uses less digits than its factorization.

8640064782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480003607 (or 480003604 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 8640064782 is about 92951.9487800014. The cubic root of 8640064782 is about 2051.9762645021.

The spelling of 8640064782 in words is "eight billion, six hundred forty million, sixty-four thousand, seven hundred eighty-two".